Clutch.



Patented July 30, l90l. E. S. BRETT.

C L U T C H (Application filed Feb. 11, 1901.)

(No Model.)

Inuen/Zor I Wmss as. I

WWW] 7 m: noam': versus ca. PuoToLrrNm. wAsnIun'rom n c UN TED STATESaren't EDWARD SAMUEL BRETT, OF COVENTRY, ENGLAND.

CLUTCH.

@IPEGIFICATION forming part of Letters Patent N 0. 679,359, dated :Tuly30, 1901. Application filed February 11,1901. serial No. 46,909- (Nomodel.)-

To all whom it may concern:

Be it known that LEDWARD SAMUEL BRETT, a subject of the King of GreatBritain, and a resident of Ashiield,Counclon road,Coventry, England,have invented new and useful Improvements in Clutches, (for which I havemade application for patent in Great Britain under No. 12,540, bearingdate July 12,1900,) of which the following is a specification.

My invention relates to improvements in clutches for driving machinery;and its objects are to provide means for starting or stopping themachinery, in combination with a continuously-running wheel, also toprovide that the cessation of movement shall be at a given point. Iattain these objects by the mechanism illustrated in the accompanyingdrawings, in which- Figure 1 is a general side view of this my inventionapplied to a power-press. Fig. 2 is a detail and enlarged front view ofthe clutch device with bracket supporting same. Fig. 3 is a detail planView of the controllingguide as seen when the machinery is stopped. Fig.4c is a plan view showing the controllingguide as seen when themachinery is put in motion. Fig. 5 is a sectional detail View of thedriving-slide on line A B, Fig. 2, as seen when the machinery is atrest. Fig. 6 is a sectional detail view of the driving-slide on line AB, Fig. 2, as seen when the machinery is put into motion. Fig. 7 is afront view in detail of the shaft.

Similar letters refer to similar parts throughout the several views.

I have illustrated this my invention as applied to a power-press, as itis usefully adaptable to such purposes; but it will be clear that myinvention may be equally well applied to the stopping and starting ofother moving machinery.

The shaft E is carried in suitable bearings in frame F. Keyed orotherwise securely fastened to the shaft is the driving-arm G. Adjoiningthe arm is the driving-wheel H, which may be driven by band orotherwise. This wheel runs freely on the shaft, being controlled fromend movement by plate I and pin J. Near the rim of the wheel a slidewayis made to carry the slide K, whose limit of movement is controlled byscrew-pin L, engaging in recess M. The front end of this slide isfurnished with a downwardly-projecting head N, by which it may be movedinwardly or outwardly.

O is a movable guide carried pivotwise at its one end by pin P from thebracket Q, which latter is secured to the frame F. This guideischannel-shaped by reason of the sides R R, which narrow toward eachother as they approach the outer end of the guide. Looking at the guidesidewise, Fig. 2, it will be seen that it is part circular in shape,agreeing with the path of travel of the end of the arm G.

S is a lever which may be operated by hand at S or by foot at Siwhoseupper end T engages with the guide 0 for the purpose of moving the saidguide to and fro into either of the two positions shown in Figs. 3 andat. A spring U is used to hold the lever S in its upward position, andthereby tends to keep the guide 0 in the position shown in Fig. 3.

It will therefore be understood that the wheel H is continuously inmotion. As it revolves the head N of the slide K travels along the guide0. When the guide 0 is free to the action of spring U, through the leverS the said slide K is held inward and clear of the arm Gr. Consequentlyno motion is imparted to the shaft E. When the lever S is depressed, theguide 0 is moved into the position shown in Fig. at. Consequently thehead N of the slide K as it travels along the guide is drawn outward asseen in Fig. 6, and comes in contact with arm G and carries it forwardas long as the guide is retained in that position, and thereby acorresponding motion is imparted to the shaft E. Upon the lever S beingagain left free to action of spring U the guide 0 is returned to theposition shown in Fig. 3, which pushes back the slide K clear of the armG, and motion of the shaft ceases. It will be further noticed that bythis arrangement of mechanism the shaft E will probably be alwaysdisconnected at the same point in its revolution by reason of the guide0, when being pushed from the driving position (shown in Fig. 4) to therest position (shown in Fig. 3,) always forcing.

the slide K clear of the arm G at the same point of travel. Therefore inthe case of a power-press, as illustrated, it is only necessary toadjust the relative position of the end of the arm G with that of thecrank V upon In clutches for starting and stopping mathe shaft to"secure the highest position of ohinery the combination with the shaftE, the latter when the shaft is thrown out of arm G rigidly securedthereto, and free wheel gear. Again, I may lessen the concussion due. Hhaving driving-slide K, with movable guide 5 to the sudden contact ofthe slide K against 0 and operating-lever S, all substantially as 15 thearm G by a spring-cushion, such as W, set forth and shown.

which is secured to the arm, as shown in EDWARD SAMUEL BRETTJ Fig. 2.Witnesses: v

What I claim'as my invention, and desire C. HAYWARD POWELL, 10 to secureby Letters Patent, is BERNARD BRETT.

